北京东灵山亚高山草甸土壤系统分类研究

为了解北京东灵山亚高山草甸土壤的状况，在东灵山山麓草甸选取了3个剖面，在土壤样品理化性质分析的基础上，按照中国土壤系统分类第3版中的方法，对样区内土壤进行分类。结果表明，样区内的土壤类型主要为暗厚干润均腐土，暗沃干润雏形土2个土类，并进一步划分为普通暗厚干润均腐土，普通暗沃干润雏形土2个亚类，由此说明，东灵山亚高山草甸土壤具有山地草甸土壤典型特质，即腐殖质表层积累丰富，但底层含量较少，易于受自然与人为因素流失。

Soil Taxonomy in Subalpine Meadow of Dongling Mountain

To understand the situation of subalpine meadow soil in Dongling Mountain, Beijing, morphological and physico-characteristics of 3 soil profiles at subalpine meadow were analyzed. According to Chinese soil taxonomy （3rd edition）, results showed that, the soil profiles in the plots were classified into 2 groups, i.e., Hapli-Ustic isohumosols and Hapli-Ustic cambosols, which were further divided into 2 subgroups, i.e. Ordinary Hapli-Ustic isohumosols and ordinary Hapli-Ustic cambosols. These showed that, subalpine meadow soil in Dongling Mountain acquired the typical characteristics of mountain meadow soil, which was higher content of humus in the surface with lower content of humus in the bottom, and easily lost by nature and human factors.